In-situ high-pressure x-ray diffraction study of zinc ferrite nanoparticles

被引：22
|
作者：
Ferrari, S. [1 ]
Kumar, R. S. [2 ]
Grinblat, F. [1 ]
Aphesteguy, J. C. [1 ]
Saccone, F. D. [3 ]
Errandonea, D. [4 ]
机构：
[1] UBA CONICET, Fac Ingn, Inst Tecnol & Ciencias Ingn Ing Hilario Fernandez, Av Paseo Colon 850, Buenos Aires, DF, Argentina
[2] Univ Nevada, High Pressure Sci & Engn Ctr, Dept Phys & Astron, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA
[3] UBA, Fac Ingn, Dept Fis, Av Paseo Colon 850, Buenos Aires, DF, Argentina
[4] Univ Valencia, Inst Univ Ciencia Mat, Dept Fis Aplicada, Malta Consolider Team, C Doctor Moliner 50, E-46100 Valencia, Spain
来源：
SOLID STATE SCIENCES | 2016年 / 56卷
关键词：
Oxides; Nanostructure; X-ray diffraction; Crystal structure; Phase transitions; NANOCRYSTALLINE TIO2 ANATASE; EQUATION-OF-STATE; COMPRESSIBILITY; TRANSITION; PHASE; PARAMETERS; STABILITY; MAGNETITE; ZNFE2O4; CRYSTAL;
D O I：
10.1016/j.solidstatesciences.2016.04.006
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We have studied the high-pressure structural behavior of zinc ferrite (ZnFe2O4) nanoparticles by powder X-ray diffraction measurements up to 47 GPa. We found that the cubic spinel structure of ZnFe2O4 remains up to 33 GPa and a phase transition is induced beyond this pressure. The high-pressure phase is indexed to an orthorhombic CaMn2O4 -type structure. Upon decompression the low-and high-pressure phases coexist. The compressibility of both structures was also investigated. We have observed that the lattice parameters of the high-pressure phase behave anisotropically upon compression. Further, we predict possible phase transition around 55 GPa. For comparison, we also studied the compression behavior of magnetite (Fe3O4) nanoparticles by X-ray diffraction up to 23 GPa. Spinel-type ZnFe2O4 and Fe3O4 nanoparticles have a bulk modulus of 172 (20) GPa and 152 (9) GPa, respectively. This indicates that in both cases the nanoparticles do not undergo a Hall-Petch strengthening. (C) 2016 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：68 / 72
页数：5
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